Motion modeling of stratospheric airship in wind field

Considering the magnitude order of the stratospheric airship´s ground speed can be compared with the magnitude order of airspeed, taking into account the influence of wind, dynamic model based on ground speed must explicitly supplement wind-induced inertial force, which would become very complicated. Initially, based on the relationship between ground speed, wind speed and airspeed in wind field, dynamic model based on airspeed is derived. The model has three advantages: a simple form; close relationship with dynamic model; without calculating wind-induced force. After that, the 6-DOF dynamic model of the stratospheric airship based on the former model is derived. The open-loop response and typical disturbance response of 6DOF equation in the nominal motion condition are simulated and simply analyzed.